Middle sole and insole combination



May 2 1944. M. MARGoLlN 2,347,701

MIDDLE soLE AND lNsoLE COMBINATION Filed Dec. 2, 1941 ATTORNEYS PatentedMay 2, 1944 UNITED STATES PATENT OFFICE MIDDLE SOLE AND INSOLECOMBINATION Meyer Margolin, Elgin, Ill.

Application December 2, 1941, Serial No. 421,292

5 Claims.

My invention relates to a novel middle soleinsole combination and moreparticularly my invention relates to a combination of middle sole formedof a resilient rubber-like material having resilient projectionsextending upwardly therefrom, the projections extending through openingsin an insole superimposed over the middle sole, the upper portion ofsaid projections being of extended area and extending over said insole.

In shoe construction it is desirable to provide resilience, aircirculation and proper foot support, and this is done by means of insoleor middle sole construction or by a combination thereof.

It is the object of the present invention to provide a shoe constructionof increased breathing properties.

It is another object of the present invention to provide a shoeconstruction which affords resilient but iirm and properly locatedsupport for the bottom of the foot.

It is a further object of this invention to provide for forced aircirculation Within the shoe.

These and further objects of my invention will be apparent from aspecific consideration of the drawing and the detailed description whichhere follows.

In Figure l I show a plan View of the insolemiddle sole combination ofmy invention.

Figure 2 is a cross section taken along the line 2-2 of Figure l.

Figure 3 is a cross section of a modified form as shown in Figure 2 inwhich the projections are separate rather than integral with the middlesole.

Figure 4 is a plan View of a modified form of my invention in which themiddle sole extends only in the forepart of the shoe and in which amultiplicity of small projections are located throughout the forepart.

Figure 5 is a cross section taken along'the line 5-5 of Figure 4.

Referring now more specifically to Figure l, I show an insole I throughwhich project the rubber-like projection II in the ball area of the footand the rubber-like projection I2 in the metatarsal area of the foot.Perforations I3 are located at spaced areas on the insole and theseperforations I3 communicate with suitable perforations in the middlesole therebeneath.

An examination of Figure 2 will more clearly indicate the structureshown in plan in Figure l. Under the insole I0 and secured thereto bystitching I is a rubber middle sole I6 with which the projections II andI2 are integral. Perforations I1 extend through the middle sole I6 andcommunicate with the perforations I3 in the insole thereabove. Theprojections II and I2 are secured at their peripheral margin to theinsole I3 by stitching I9 and 2D. Grooves 2| are located in the bottomof the middle sole I6 and these grooves may be isolated from or indirect connection with the perforations I3 and I 'l as in the case ofgroove 22. On flexing of the foot in walking, the resilient middle soleI6 is flexed and compressed causing air to be pumped Ifrom the grooves2I and 22 through the adjacent or connecting perforations I3 and Il.Since the projection I I is integral with the middle sole I6, slightlateral spacing is provided between central portion 24 of the projectionII and the side wall 25 of the opening in the insole I0. The entireassembly is positioned over and suitably secured to an outsole 2B.

Thus, the rubber projection II can be compressed and forced through theopening in the insole Ill whereupon it regains its original shape andspreads out over the insole Ill lying flat thereon. The upper portion ofthe projection Il extends like a flap over the insole IB and providesboth increased thickness at that portion for ball cushion support and inthe case of projection I2 provides metatarsal arch support. Further, theflexibility of the entire assembly is increased by the opening in theleather insole IU through which the projections I I and I2 extend.

In Figure 3 I show a modified form of this invention in which a leatherinsole 30 having openings 3l and 32 therein is secured over a rubbermiddle sole 34 by stitching 35. A rubber projection 3l is positioned andsecured in the assembly 'by securing downwardly extending centralportion 38 of the projection in the opening 3|, the bottom of thisprojection being secured to the middle sole 34 by a suitable adhesive4U. 'Ihe projection may be peripherally secured to the insole 30 bystitching 4l. However the stitching 4I may not be necessary since theadhesive 40 firmly secures the projection to the middle sole. The middlesole and the insole are provided with perforations 43 and grooves 44 andthe periorations and grooves may be in alignment as at 45. The rubberprojection 46 may be suitably secured in the opening 32 in themetatarsal region and is adhesively secured to the middle sole by cement41. The projection 46 is peripherally secured to the insole 30 bystitching 48.

By providing these separate rubber projections which are adhesivelysecured to the resilient middle sole through the insole I provide asomewhat simpler method of assembly of the construction,

while securing the new and desirable advantages thereof.

In Figure I show an inner sole 50 through which extend projections 5|,52 and 53 which projections are integral with a rubber middle sole 55.By providing a central opening 56 in the resilient projection 5l, I maymake the opening 51 in the insole 50 of substantially the same size asthe central portion 58 of the projection, since the middle portion 58 ofthe projection may then be compressed so .as vto facilitate the pressingthrough of the sidewardly extending rubber portion of the projection 5I.As described above the peripheral margin of the projections 5I, etc.,may be secured by stitching to the insole. Such securement by stitchingis not always necessary when the upper portions of these projectionshave a limited sideward extension. The middle soleinsole combinationrests on the outsole 60.

The middle sole is provided with grooves 6I and perforations E2 whichextend .through both insole and middle sole.

By the construction here described, I provide a novel insole-middlesoleconstruction for a shoe so that I obtain .a rm unit for utility in theshoe that is possessed of very desirable resilience and yforcedbreathing .properties because of the construction as shown, and I alsoprovide the increased thickness with softness in such areas wheresupport is desired.

The Iprojection extending through the insole and secured to vthe middlesole also firmly unites the middle sole to the insole and prevents anyseparation therebetween.

These projections may generally be described as comprising a neckportion vand an extending mushroom-like top portion. The neck portion ofthe projection extends through the openings or holes 'in the insole,while the mushroom-like top portion extends over the insole or thatportion of the insole adjacent the openings.

The projectionsv are resilient and are formed of suitable resilientmaterial such as rubber.

By means `of the features and the structure Aabove set forth, I obtainthe desirable results of resilience, foot support, and propercirculation of air as set forth in the objects hereinbefore.

Various other modifications of my invention will suggest themselves tothose skilled in the art. I accordingly desire that in construing thebreadth of the appended Aclaims that they shall not be limited to thespecic details shown and described in connection with the aboveexplanation.

I claim:

1. In combination, a middle sole and insole, said insole having at leastone opening extending through the Athickness thereof, said middle solehaving at least one projection positively secured thereto and extendingupwardly therefrom, said projection positively having a neck portion andan extending mushroom-like top portion, said neck portion extendingthrough said opening in said insole, said mushroom-like top portionextending over said insole adjacent said opening.

2. In combination, a middle sole and insole, said insole having at leastone opening extending Vthrough the thickness thereof, said middle solehaving at least one projection positively secured thereto and extendingupwardly therefrom, said projection positively having a neck portion`and an extending mushroom-like top portion, and `a central openingextending through said projection, said neck portion extending throughsaid opening in said insole, said mushroom-like top portion extendingover said insole adjacent said opening.

3. In combination, a middle sole and an insole, said insole having atleast one opening extending through the .thickness thereof, rsaid middlesole having at least one projection kpositively secured thereto andextending upwardly therefrom, said projection positively having a neckportion and an extending mushroom-like top portion, said neck portionextending through said opening in said insole, said mushroom-like topportion extending over said insole adjacent said opening, and means forsecuring the edges of said mushroom-like top portion to said insole.

4. In combination, a middle sole and insole, said insole having at leastone opening extending through the thickness thereof, said middle solehaving at least one projection positively secured thereto and extendingupwardly therefrom, said projection positively having a neck portion andan extending mushroom-like top portion, said neck portion extendingthrough said opening in said insole, said mushroom-like top portionextending over said insole adjacent said opening, said openings in saidinsole being appreciably larger in diameter than the neck of saidprojection.

5. In combination, a middle sole and insole, said insole having at leastone opening extending through the thickness thereof, said middle solehaving at least one projection positively secured thereto and extendingupwardly therefrom, said projection positively having a neck portion andan extending mushroom-like top portion, said neck portion extendingthrough said opening in said insole, said mushroom-like top portionextending over said insole adjacent said opening, said middle solehaving grooves on the underside thereof, and perforations through saidinsole and middle sole communicating with said grooves.

MEYER MARGOLIN.

